Question

2 sobre 5 x-2= x sobre 4 +4

Answer 1

2*(x - 2)/5 = x/4 + 4

2*(x - 2)/5 = (x + 16)/4

(2x - 4)/5 = (x + 16)/4

4*(2x - 4) = 5*(x + 16)

8x - 16 = 5x + 80

8x - 5x = 80 + 16

3x = 96

x = 96/3 = 32

Answer 2

(5x-2)/2=(4+4)/x multiplicação cruzada

x(5x-2)=16

5x²-2x-16=16-16

5x²-2x-16=0

x=(-b+ou-Ãb2-4ac)/2a

x=[-(-2)+ou-Ã(-2)²-4x5x(-16)]/2x5

x=(2+ou-Ã4+320)/10

x=(2+ou-Ã324)/10

x=(2+ou-18)/10

x1 x=(2+18)/10

x1=2

x2 x=(2-18)/10

x2-16/10 simplificando

x2=-8/5

obs:Ã  equivale a raiz quadrada